High-Nitrogen Sulfur Fertilizers: Innovative Development and Application Value

In modern intensive agriculture, macronutrient fertilizers such as nitrogen, phosphorus, and potassium are widely used, but sulfur, a key secondary nutrient, is often overlooked. Sulfur is essential for synthesizing sulfur-containing amino acids, proteins, vitamins, and chlorophyll formation, directly impacting crop yield and quality. However, with the strengthening of global industrial emission reduction measures, atmospheric sulfur deposition from natural sources (e.g., volcanic activity) and anthropogenic sources (e.g., fossil fuel combustion) continues to decline, leading to increasing deficiencies of bioavailable sulfate in many farmland soils. Simultaneously, industrial processes like oil refining and natural gas processing generate millions of tons of elemental sulfur by-products annually, some of which are not utilized efficiently. This acute supply-demand contradiction highlights the extreme urgency of developing sustainable technologies to convert industrial sulfur by-products into efficient agricultural fertilizers. This study focuses on the design and preparation of high-nitrogen sulfur fertilizers, aiming to closely integrate industrial sulfur resources with crop nitrogen demand through innovative engineering solutions, providing new nutrient management strategies for the sustainable production of global food and energy crops.

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